History OneHitKill / AnimeAndManga

** Three examples from the Yonko, the Emperors of the sea.

* Yuki Nagato in ''Ligterature/HaruhiSuzumiya'' -- "Commence termination of data link". Pwned. This is also the reason why she won against [[spoiler:Asakura]], who was busy jumping around, throwing metal spears, while Yuki hacked the time-space program ([[{{Technobabble}} whatever that is]]). It's also why Yuki was so seemingly weak for the bulk of the fight: she was devoting all of her attention to setting a single winning move.

* In ''LightNovel/ACertainMagicalIndex'', Fiamma of the Right has "The strike that ends everything it touches", which annihilates anything it hits without any destructive force, meaning it cannot be blocked, and "The strike that reaches everything when swung", which reaches the target without any speed, meaning it cannot be dodged.

* ''LightNovel/{{Durarara}}'': Shizuo Heiwajima against basically everyone. Since this is a series with mostly human-level power, and then [[SuperStrength Shizuo starts throwing cars at people]], it's a miracle everyone he fights isn't reduced to a fine red paste. At one point, Masaomi insists that he "get even" for wronging Shizuo earlier, so Shizuo flicks him in the forehead. Masaomi is knocked head over ass and is left dazed on the pavement.
* In ''Manga/{{Eyeshield 21}}'', [[TheRival Seijuro]] [[TheAce Shin]] perfecting his Spear Tackle into Trident Tackle. The tackle is so overwhelming that if the player didn't go out on stretcher, ''they're so traumatized that they refuse to touch the ball ever again.'' Of course there's players that can shrug it off, [[CharlesAtlasSuperpower but most of them are not]] [[{{Determinator}} exactly "normal" to begin with.]]

* Yuki Nagato in ''LightNovel/HaruhiSuzumiya'' -- "Commence termination of data link". Pwned. This is also the reason why she won against [[spoiler:Asakura]], who was busy jumping around, throwing metal spears, while Yuki hacked the time-space program ([[{{Technobabble}} whatever that is]]). It's also why Yuki was so seemingly weak for the bulk of the fight: she was devoting all of her attention to setting a single winning move.

* Ichika's ''LightNovel/InfiniteStratos'' is capable of only this, its ability basically amounting to "rush in to disable the opponent."

** Shiki Ryougi from ''LightNovel/TheGardenOfSinners'' has even more hax, she can stab ''magic'' to death, like ghosts or telekinetic blasts.

* ''LightNovel/{{Slayers}}'':

** Urek Mazino all the way. In what little screen time he had up till now in ''Webcomic/TowerOfGod'', [[spoiler:he one shot certified BAMF Viole, killed two [[AuthorityEqualsAsskicking Rankers]] in an instant and took another down with a simple kick.]] And this is just all the fighting we have seen on screen.

** In the same movie Gogeta’s “Stardust Breaker” proves to be kind of HolyHandGrenade as in some translations it’s inferred it [[GoodHurtsEvil destroys evil]] souls which is why Gogeta was able to disintegrate SatanicArchetype Janemba with it. [[spoiler:It failed to work on Broly [[Anime/DragonBallSuperBroly in canon]] when Gogeta used it, however it this may of been due Broly not being genuinely evil like Janemba or [[Anime/DragonBallZBrolyTheLegendarySuperSaiyan his original movie counterpart]] were]].

** In ''Anime/MobileSuitGundamSeedDestiny'', the Destiny Gundam's ''Palma Fiocina'', or [[FanNickname Destiny Finger]], is made out to be this. Whether on a basic mobile suit, or the gigantically overpowered Destroy Gundam, if this attack lands, the fight is over. The only time it fails is when it doesn't hit.
** The Palma Fiocina gets its FanNickname because it's a ShoutOut to the Shining Finger and Bakunetsu God Finger attacks in ''Anime/MobileFighterGGundam'', which always end the fight in one hit when landed successfully. During the preliminaries of the Gundam Fight, any Gundam that has its head destroyed is eliminated. Thus, the Shining Finger involves grabbing the opposing Gundam's head and melting through it. During the finals, the corrupt Prime Minister Wong Yunfat [[ScrewTheRulesIMakeThem changes the rules]] so that a Gundam can be rebuilt after a battle even if its head is destroyed. Cue the Bakunetsu God Finger, which ''disintegrates the entire enemy Gundam''.

** Trafalgar Law's Gamma Knife. It requires both him and the target to be inside one of Law's ROOM [[note]]Which has a number of limitations: he can only create one at a time; he cannot modify a Room once it has been created -- he has to dismiss the old one before creating a new one; and creating a ROOM (and, in fact, using ''any'' technique of the Ope-Ope Fruit) saps his stamina, the more the bigger the ROOM he intends to create.[[/note]]; it consumes a high amount of stamina; and it has point-blank range. But it flays the internal organs of the target while completely ignoring its skin. Thus, it bypasses ''any'' armor, no matter how strong -- including Haki.

** In ''Manga/GoldenWind'', Diavolo's favorite fighting style consists of using King Crimson's time erasure ability to simultaneously disorient his opponent and position himself in the right spot to kill them in one hit, often by sending King Crimson's fist straight through their chest.

* ''Anime/{{Pokemon}}'': On occasion, some Pokemon will instantly knock out their opponent with a single attack. This isn't always consistent -- sometimes TheWorfEffect comes into play, or it can break the series' logic by having Pokemon with a type advantage lose to the weaker of the species -- but it has happened.

* Yuki Nagato in ''LightNovel/HaruhiSuzumiya'' - "Commence termination of data link". Pwned. This is also the reason why she won against [[spoiler:Asakura]], who was busy jumping around, throwing metal spears, while Yuki hacked the time-space program ([[{{Technobabble}} whatever that is]]). It's also why Yuki was so seemingly weak for the bulk of the fight: she was devoting all of her attention to setting a single winning move.

** Trafalgar Law's Gamma Knife. It requires both him and the target to be inside one of Law's ROOM [[note]]Which has a number of limitations: he can only create one at a time; he cannot modify a Room once it has been created - he has to dismiss the old one before creating a new one; and creating a ROOM (and, in fact, using ''any'' technique of the Ope-Ope Fruit) saps his stamina, the more the bigger the ROOM he intends to create.[[/note]]; it consumes a high amount of stamina; and it has point-blank range. But it flays the internal organs of the target while completely ignoring its skin. Thus, it bypasses ''any'' armor, no matter how strong - including Haki.

* ''Anime/{{Pokemon}}'': On occasion, some Pokemon will instantly knock out their opponent with a single attack. This isn't always consistent--sometimes TheWorfEffect comes into play, or it can break the series' logic by having Pokemon with a type advantage lose to the weaker of the species--but it has happened.

** Shay Obsidian also performs to do a "One Turn, Three Kill" with his "Raidraptor - Rise Falcon" against Julia, Dipper, and Kit.

* ''Manga/JojosBizarreAdventure'': During Ripple Era a single ripple-powered punch was enough to kill either a zombie or a vampire. The most difficult part was landing the blow, since undead possess abilities exceeding those of human beings, putting this trope in use for both protagonists and antagonists.

* In ''Manga/RosarioToVampire'', [[TheDragon Akuha Shuzen]] of Fairy Tale has this ability. Using a magical technique which 'delays her existence by a second' every one of her attacks can just cut through people like paper, taking them apart by basically ''cutting the reality they're standing in''. Three people so far have shown resistance to this attack method, and two of those do it by blocking it with the same technique (the third uses a separate technique designed for the sole purpose of defending against Akuha). Two other people survive it because cutting them in half isn't enough to kill them: One is [[OurZombiesAreDifferent already dead]], and the other simply put the two pieces of her body back together and let her extreme HealingFactor handle the rest.

* In ''Manga/AkameGaKill'', Akame uses the phrase "One slice, certain death" for a reason. Anytime she slashes someone with Murasame, that person dies instantly if she manages to draw blood. On the other hand, if you accidentally cut your finger with Murasame itself, you yourself die instantly. [[LogicalWeakness Since it works by a special poison, it also doesn't do squat against zombies or anything that doesn't have a heart]].

* In ''Manga/AkameGaKill'', Akame uses the phrase "One slice, certain death" for a reason. Anytime she slashes someone with Murasame, that person dies instantly if she manages to draw blood. On the other hand, if you accidentally cut your finger with Murasame itself, you yourself die instantly. [[LogicalWeakness It also doesn't do squat against zombies or anything that doesn't have a heart]].

* In ''Manga/AkameGaKill'', Akame uses the phrase "One slice, certain death" for a reason. Anytime she slashes someone with Murasame, that person dies instantly if she manages to draw blood. On the other hand, if you accidentally cut your finger with Murasame itself, you yourself die instantly. [[KryptoniteFactor It also doesn't do squat against zombies or anything that doesn't have a heart]].

** Sanji's Anti Manner kick course is also a good example as when he first used it, he effortless one-shot a [[NeverSmileataCrocodile Bananawani]]. But the flying horizontal version he used in Thriller is 10x more awesome as Sanji used it to topple the [[OurGiantsAreBigger humongous Oars]]. Hell even with a normal kick, Sanji can kill a [[TyrannosaurusRex T-Rex]] in Little Garden.

** Most swings with Gut's [[{{BFS}} Dragonslayer]] will instantly kill a man... [[https://encrypted-tbn0.gstatic.com/images?q=tbn%3AANd9GcTfSwQR5H5QLb7azhILrKDhGwB-hnKM5PYK9vufsPzVdvgmozNm and the horse he was sitting on]] and anyone standing too close by. Most [[HumanoidAbomination Apostles]] can't [[https://uploads.disquscdn.com/images/4f0b49adb2aa1a0ce17289be1678250372e54c09bdbfafc0f47860f556af78a5.gif handle]] the full swing of this hunk of steel though stronger Apostles can usually [[SuperToughness tank it]] or have a HealingFactor. Guts can also kill a man instantly with his [[ArtificialLimbs metal arm]] either by [[PowerFist punching them]] or using the [[ArmCannon hidden cannon]]. Of course, this is not a matter of technique; when [[{{BFS}} so much steel]] gets in [[SuperStrength so much motion]], the laws of physics will have no choice but to let you die.

** Luffy's ''Red Hawk'' was a surefire ([[ElementalPunch literally]]) K.O punch prior to Dressrosa, case in point Byrnndi World and Hordy Jones who each took one to chest and stopped fighting abruptly. Doflamingo, however, when facing Luffy, shrugged off a Red Hawk to the straight to the gut only getting slightly damaged, and kept on fighting [[NoSell no problem]].

* ''Manga/MahouSenseiNegima'':
** The invaders during the Battle of Mahora [[StoryArc arc]] switched from [[TheNudifier stripper rays]] to "time displacement rounds" that send the target three hours forward in the future to when they've already lost for the ultimate in battlefield removal when things got serious.
** Asuna's fan also inflicts one hit kills on shikigami and summoned beings. Since she can [[AntiMagic do this]] [[MagicFeather anyway]], she replaced it with a {{BFS}} which can do it from a short distance.

** This is why Shiki Tohno from ''{{VisualNovel/Tsukihime}}'' is described as "the greatest wild card" (not the [[WildCard trope]]): since his [[MagicalEye Mystic Eyes]] perceive the concept of Death as lines and dots over ''everything'', all he needs is one chance to [[DeaderThanDead kill]] his opponent. Given his natural [[SuperPoweredEvilSide killing abilities]] and [[InTheBlood inborn assassins' skills]], all of his fights begin/end with this. In some scenarios, he has been able to kill hallways, a vampire infection (before it takes over his body), and the poison inside someone else's body; although this requires it to be CastFromHitPoints.
** Shiki Ryougi from ''LightNovel/KaraNoKyoukai'' has even more hax, she can stab ''magic'' to death, like ghosts or telekinetic blasts.

* ''Manga/OnePunchMan''

* In ''LightNovel/ACertainMagicalIndex'', [[spoiler: Fiamma of the Right has "The strike that ends everything it touches", which annihilates anything it hits without any destructive force, meaning it cannot be blocked, and "The strike that reaches everything when swung", which reaches the target without any speed, meaning it cannot be dodged.]]

** Luffy's ''Red Hawk'' was a surefire ([[ElementalPunch literally]]) K.O punch prior to Dressrosa, case in point Byrnndi World and Hordy Jones who each took one to chest and stopped fighting abruptly. Domflamingo however when facing Luffy shrugged off a Red Hawk to the straight to the gut only getting slightly damaged, and kept on fighting [[NoSell no problem]].